Improvement in piano-locks



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`ROBERT J. JORDAN,

OFNEW 'YORK, N. Y;-

Lctwrs Patent N0. 88,488, (lated .Ma/rch 30, 1869.

IMPROVEMENT. IN PIANO-LOCKS.

The Schedule referred to` in these Letters Patent and making part of the same.

To all whom it may concern:

Be it knownthat I, ROBERT J. JORDAN, of the city, county, and State of New York, have invented a new and useful Improvement in Piano and Sewing- Machine Looks; and I do hereby declare' thalt the following is a full, clear, andV exact description thereof',

which will enable others skilled in the art to make and use the same,'reference being had to the accompanying drawings, forming part of this specification.

' Figure 1 vis a detail view of the-inner side of my improved lock, part of the cap-plate being` broken away, and showing the bolt drawn back, or unlocked Figure 2 is the same view as fig. 1, but showing the bolt pushed forward, or locked.

Similar letters of reference indicate corresponding .parts Myinvention has for its object to furnish animprovement inthe construction of locks, designed esecially for piano and sewing-machine locks, but equally applicable for other locks, and hymeans of which a neat, simple, and reliable lock is produced;

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-upon it, which said ilange is slotted 'to receive the spiral part of the bolt C, as shown in gs. 1 and 2.'

The rear, or. inner end'o'i the sliding plate Bis slotted to receive the stem, or shank of the guard-plate D, the' shoulders, or ends of the body of which plate rest upon the plate B, and keep it close to the lock-plate A, while being operated.

TheV upper part of the plate D is slotted to receive the stem, orl neck of the bolt C.

The forward part of the neck of the bolt is formed with a shoulder, of such asjze and form as, when in proper position, to be received into the slot of the plate D, as shown in iig. l; but which, when the bolt is thrown or locked, serves asa stop to preventthe bolt from beingpushed back.-

The forward part of the bolt C, that .passes through -the slot in the flangelb of the sliding plate B, is made in the form of a spiral, making a one-quarter turn, as

shown in figs. 1 and 2,. so that the operation of pushing the bolt C forward 4or back, may revolve the' bolt through one-quarter of a revolution.

when revolved one-quarter, cannot be withdrawn from 'said plate. p

The edge of the sliding plate B, andthe side ofthe bolt C, are recessed, as shown in iigs. 1 and 2,'sothat theylnay be acted upon by the key, to move them back and forth. r

that in locking the lock, the Aiirst movement is to carry the bolt C and plate B forward together, until the head of thebolt C haspassed through the catch-plate E, at which point the. advance of the bolt O is stopped by the head fo1med ,upon the rear end of said bolt strik- 4ing against the slotted guard-plate D. Then, as the sliding plate B is carried forward, its advance causes the bolt G to revolve one-quarter of a revolution, so that its head may catch upon the catch-plate E.

In unlockingthe lock, these movements are exactly reversed, the first effect of the key being -to move th plate B back, revolving the bolt G to its former position.

The bolt O and plate B are then carried back together, until the head of the bolt C has been Withdrawn from the catch-plate E, and into its place in the face-plate of the lock.

another piu attached to said plate.

The other end of the spring F is divided, one part resting against the bolt C, and the other part resting against the sliding plate-B-, as shown in figs. l and 2.

The object of thespring F is simply to support the sliding plate. B and bolt C, and give steadiness to their movement while being operated by the key in locking and unlocking-the look.

.I do not claim, broadly, a revolving bolt, provided with a cross-head, as I am aware that such have been used; but

ters Patent, is-

1. The arrangement of the guard-plate D, spring F,

and revolving bolt C, the latter being operated by a keyfan'd` provided with a cross-head, which, after enteringthe catch-plate, is turned, so that it cannotbe withdrawn, except by the key, substantially 'as herein described. 4 Y 2. The bolt G, sliding plate B b', and guard-plate D, in combination with each other, and with the lockplate A, all operating substantially as herein shown and described, and for the purpose set forth..

The above specification of my invention signed by me, this 11th day of November, 1868.v

Y p ROBERT J.V JORDAN.

Witnesses:

FRANK BLooKLEY, JAMES T. GRAHAM.

The recesses in the plate B and bolt C areso formed,

F is a spring, which is pivoted 'to a pinattachedtoV the lock-plate A, and one end of which rests against What I claim as new', and desire to secure by Letl 

